Guang, R, Rudman, M, Chryss, A, Slatter, P & Bhattacharya, S 2011, 'Direct numerical simulation (DNS) investigation of turbulent open channel flow of a Herschel-Bulkley fluid', in R Jewell & AB Fourie (eds), Proceedings of the 14th International Seminar on Paste and Thickened Tailings
, Australian Centre for Geomechanics, Perth, pp. 439-452.
In this research, the turbulent behaviour of non-Newtonian suspensions in open channel conditions will be examined and investigated. With lack of fundamental understanding about the mechanisms involved about how turbulent flows of non-Newtonian fluid transport suspension particles, direct numerical simulation may come into the research as a useful validation tool. A better understanding of the mechanism operating in the turbulent flow of non-Newtonian suspensions in open channel flow would lead to improved design of many of the systems used in the mining and mineral processing industries. The main aim of the study is to describe how does a non-Newtonian fluid transport particles in an open channel and validation of a computational model.
Direct numerical simulation (DNS) of the turbulent flow of non-Newtonian fluids in an open channel is modelled using a spectral element-Fourier method. The simulation of a yield–pseudoplastic fluid using the Herschel–Bulkley model agrees qualitatively with experimental results from field measurements of mineral tailing slurries. The effect of variation in flow behaviour index is investigated and used to assess the sensitivity of the flow to these physical parameters. This methodology is seen to be useful in designing and optimising the transport of slurries in open channels.
Clapp, R.M. (1961) Turbulent heat transfer in pseudoplastic non-Newtonian fluids, International Development of Heat Transfer, Part III, New York.
Dimitropoulos, C., Dubief, Y., Shaqfeh, E., Moin, P. and Lele, S. (2005) Direct numerical simulation of polymer-induced drag reduction in turbulent boundary layer flow, Physics of Fluids, Vol. 17, 011705.
Fitton, T. (2007) Tailings beach slope prediction, PhD thesis, RMIT University, Melbourne, Australia.
Joung, Y., Choi, S.U. and Choi, J.I. (2007) Direct numerical simulation of turbulent flow in a square duct: analysis of secondary flows, Journal of Engineering Mechanics, Vol. 133(2), pp. 213–221.
Kim, J., Moin, P. and Moser, R. (1987) Turbulence statistics in fully developed channel flow at low Reynolds number, Journal of Fluid Mechanics, Vol. 177, p. 133.
Moser, R., Kim, J. and Mansour, N. (1999) Direct numerical simulation of turbulent channel flow up to Reτ=590, Physics of Fluids, Vol. 111(4), pp. 943–945.
Nezu, I. (2005) Open-Channel flow turbulence and its research prospect in the 21st century, Journal of Hydraulic Engineering, Vol. 31(4), pp. 229–246.
Pinho, F. and Whitelaw, J. (1989) Flow of Non-Newtonian fluids in a pipe, Journal of Non-Newtonian Fluid Mechanics, Vol. 34(1990), pp. 129–144.
Rudman, M. and Blackburn, H.M. (2003) The effect of shear thinning behaviour on turbulent pipe flow, Third International Conference on CFD in the Minerals and Process Industries, CSIRO, Melbourne, Australia.
Rudman, M. and Blackburn, H.M. (2006) Direct numerical simulation of turbulent non-Newtonian flow using a spectral element method, Applied Mathematical Modelling, Vol. 130, pp. 1229–1248.
Rudman, M., Blackburn, H.M., Graham, L.J. and Pullum, L. (2001) Weakly turbulent pipe flow of a power law fluid, 14th Australasian Fluid Mechanics Conference, Adelaide University, Adelaide, Australia.
Rudman, M., Blackburn, H.M., Graham, L.J. and Pullum, L. (2004) Turbulent pipe flow of shear-thinning fluids, Journal Non-Newtonian Fluid Mechanics, Vol. 118, pp. 33–48.
Sureskumar, R., Beris, A. and Handler, A. (1997) Direct numerical simulation of the turbulent channel flow of a polymer solution, Physics of Fluids, Vol. 9, pp. 743–755.
Verbanck, M. (2000) Computing near-bed solids transport in sewers and similar sediment-carrying open-channel flows, Urban Water, Vol. 2, pp. 277–284.
Wilson, K.C. (1991) Slurry transport in flumes, Slurry handling design of solid liquid system, N.P. Brown, N.I. Heywood (eds), Elsevier, London.